Daikin FTX50GV1B Service Manual

Service Manual[Applied Models]z Inverter Pair : Heat PumpInverter PairWall Mounted Type G-SeriesSiBE041029_A

Introduction SiBE041029_Aix1.2 Used IconsIcons are used to attract the attention of the reader to specific information. The meaning of each icon is de

Troubleshooting SiBE041029_A90 Service Diagnosis4.23 Electrical Box Temperature RiseError CodeL3Method of Error DetectionAn electrical box temperature

SiBE041029_A TroubleshootingService Diagnosis 914.24 Radiation Fin Temperature RiseError CodeL4Method of Error DetectionA radiation fin temperature ri

Troubleshooting SiBE041029_A92 Service DiagnosisTroubleshootingCheck No.17Refer to P.101Check No.19Refer to P.102Note: Refer to “Silicon Grease on Pow

SiBE041029_A TroubleshootingService Diagnosis 934.25 Output Overcurrent DetectionError CodeL5Method of Error DetectionAn output overcurrent is detecte

Troubleshooting SiBE041029_A94 Service DiagnosisTroubleshootingCheck No.15Refer to P.99Check No.17Refer to P.101Check No.18Refer to P.101Check No.22Re

SiBE041029_A CheckService Diagnosis 955. Check5.1 Thermistor Resistance CheckCheck No.01 Disconnect the connectors of the thermistors from the PCB, an

Check SiBE041029_A96 Service Diagnosis5.2 Fan Motor Connector Output CheckCheck No.02 1. Check the connection of connector.2. Check the motor power su

SiBE041029_A CheckService Diagnosis 975.4 Electronic Expansion Valve CheckCheck No.12 Conduct the followings to check the electronic expansion valve (

Check SiBE041029_A98 Service Diagnosis5.5 Four Way Valve Performance CheckCheck No.135.6 Inverter Units Refrigerant System CheckCheck No.14(R15737)NOY

SiBE041029_A CheckService Diagnosis 995.7 Inverter Analyzer CheckCheck No.15CharacteristicsInverter analyzer: RSUK0917CIf an abnormal stop occurs due

SiBE041029_AList of Functions 1Part 1List of Functions1. Functions...

Check SiBE041029_A100 Service DiagnosisDiagnose method (Diagnose according to 6 LEDs lighting status.)(1) If all the LEDs are lit uniformly, the comp

SiBE041029_A CheckService Diagnosis 1015.9 Installation Condition CheckCheck No.175.10 Discharge Pressure CheckCheck No.18Installation condition check

Check SiBE041029_A102 Service Diagnosis5.11 Outdoor Fan System CheckCheck No.19 DC motor5.12 Main Circuit Short CheckCheck No.20 RX50/60G3V1B onlyNote

SiBE041029_A CheckService Diagnosis 1035.13 Capacitor Voltage CheckCheck No.21 RX50/60G2V1B, 71 class onlyBefore this check, be sure to check the main

Check SiBE041029_A104 Service DiagnosisRX50/60G2V1B, 71 class The illustration is for 71 class as representative.RX50/60G3V1B(R16073)Power modulePowe

SiBE041029_ATrial Operation and Field Settings 105Part 7Trial Operation andField Settings1. Pump Down Operation...

Pump Down Operation SiBE041029_A106 Trial Operation and Field Settings1. Pump Down OperationOutline In order to protect the environment, be sure to co

SiBE041029_A Forced Cooling OperationTrial Operation and Field Settings 1072. Forced Cooling OperationIndoor UnitOutdoor Unit: RX50/60G2V1B, 71 class+

Trial Operation SiBE041029_A108 Trial Operation and Field Settings3. Trial OperationOutline 1. Measure the power supply voltage and make sure that it

SiBE041029_A Field SettingsTrial Operation and Field Settings 1094. Field Settings4.1 When 2 Units are Installed in 1 RoomOutline When 2 indoor units

Functions SiBE041029_A2 List of Functions1. FunctionsCategory FunctionsFTX50/60/71GV1BRX50/60G2V1BRX71GV1BCategory FunctionsFTX50/60/71GV1BRX50/60G2V1

Field Settings SiBE041029_A110 Trial Operation and Field Settings4.2 Facility Setting Switch (cooling at low outdoor temperature)Outline This function

SiBE041029_A Field SettingsTrial Operation and Field Settings 1114.3 Jumper and Switch SettingsIndoor UnitFor the location of the jumper, refer to pag

Silicon Grease on Power Transistor / Diode Bridge SiBE041029_A112 Trial Operation and Field Settings5. Silicon Grease on Power Transistor / Diode Brid

SiBE041029_AAppendix 113Part 8Appendix1. Piping Diagrams...1141.1 Indoo

Piping Diagrams SiBE041029_A114 Appendix1. Piping Diagrams1.1 Indoor Unit1.2 Outdoor UnitRX50/60G2V1BFTX50/60GV1B FTX71GV1BFIELD PIPINGFIELD PIPING(12

SiBE041029_A Piping DiagramsAppendix 115RX50/60G3V1BRX71GV1B, RX71GV1B9OUTDOOR UNITHEAT EXCHANGER7.9CuT7.9CuT7.9CuT7.9CuT7.9CuT12.7CuTCAPILLARY TUBE 1

Wiring Diagrams SiBE041029_A116 Appendix2. Wiring Diagrams2.1 Indoor UnitFTX50/60/71GV1B2.2 Outdoor UnitRX50G2V1BPCB4PCB3PCB5LED1H1PR1TtS37S38°LED2H2P

SiBE041029_A Wiring DiagramsAppendix 117RX60G2V1BRX50/60G3V1BINDOORSA2OUTDOORX1MSHEET METALGRNYLWFIELD WIRINGS10MRM10WHTLBLUY1EPCB1BRNS90R2TWVYLWE2BLU

Wiring Diagrams SiBE041029_A118 AppendixRX71GV1B, RX71GV1B9L1RGRNZ7CGRNYLWZ1CX1MZ6CBLUFU3WHTGRN7REDM1FE1E2LHR2SA2HR1MRM203.15APOWER SUPPLYV100MV2Z2CAC

SiBE041029_A Removal Procedure (Booklet No.)Appendix 1193. Removal Procedure (Booklet No.)Refer to the following booklets for removal procedure.∗FTX50

SiBE041029_A FunctionsList of Functions 3Category FunctionsFTX50/60/71GV1BRX50/60G3V1BRX71GV1B9Category FunctionsFTX50/60/71GV1BRX50/60G3V1BRX71GV1B9B

Revision HistoryMonth / Year Version Revised contents03 / 2010 SiBE041029 First edition12 / 2012 SiBE041029_A Model addition: RX50/60G3V1B, RX71GV1B9

Head Office:Umeda Center Bldg., 2-4-12, Nakazaki-Nishi,Kita-ku, Osaka, 530-8323 JapanTokyo Office:JR Shinagawa East Bldg., 2-18-1, Konan,Minato-ku, To

SiBE041029_A4 SpecificationsPart 2Specifications1. Specifications ...

SiBE041029_A SpecificationsSpecifications 51. Specifications50 Hz, 220 - 230 - 240 VNote: The data are based on the conditions shown in the table bel

Specifications SiBE041029_A6 Specifications50 Hz, 220 - 230 - 240VNote: The data are based on the conditions shown in the table below.ModelIndoor Uni

SiBE041029_A SpecificationsSpecifications 750 Hz, 220 - 230 - 240 VNote: The data are based on the conditions shown in the table below.ModelIndoor Un

Specifications SiBE041029_A8 Specifications50 Hz, 220 - 230 - 240VNote: The data are based on the conditions shown in the table below.ModelIndoor Uni

SiBE041029_APrinted Circuit Board Connector Wiring Diagram 9Part 3Printed Circuit BoardConnector Wiring Diagram1. Indoor Unit...

SiBE041029_Ai Table of ContentsInverter PairWall Mounted TypeG-SerieszHeat PumpIndoor UnitFTX50GV1BFTX60GV1BFTX71GV1BOutdoor UnitRX50G2V1B RX50G3V1BRX

Indoor Unit SiBE041029_A10 Printed Circuit Board Connector Wiring Diagram1. Indoor UnitPCB (1): Control PCBCaution Replace the PCB if you accidentally

SiBE041029_A Indoor UnitPrinted Circuit Board Connector Wiring Diagram 11PCB (2): Signal Receiver PCBPCB (3): Buzzer PCBPCB (4): Display PCBPCB (5): I

Outdoor Unit SiBE041029_A12 Printed Circuit Board Connector Wiring Diagram2. Outdoor Unit2.1 RX50/60G2V1B, 71 ClassPCB (1): Main PCBRX50/60G2V1B1) S10

SiBE041029_A Outdoor UnitPrinted Circuit Board Connector Wiring Diagram 1371 classPCB (2): Service Monitor PCB SW4-A has no function. Keep it OFF.V3A

Outdoor Unit SiBE041029_A14 Printed Circuit Board Connector Wiring Diagram2.2 RX50/60G3V1BPCB (1): Filter PCB1) S11 Connector for [S10] on main PCB2)

SiBE041029_A Outdoor UnitPrinted Circuit Board Connector Wiring Diagram 15PCB (2): Main PCBCaution Replace the PCB if you accidentally cut the jumpers

SiBE041029_A16 Function and ControlPart 4Function and Control1. Main Functions...

SiBE041029_A Main FunctionsFunction and Control 171. Main Functions1.1 Temperature ControlDefinitions of TemperaturesThe definitions of temperatures a

Main Functions SiBE041029_A18 Function and ControlDrawing of InverterThe following drawing shows a schematic view of the inverter principle:Inverter F

SiBE041029_A Main FunctionsFunction and Control 191.3 Airflow Direction ControlPower-Airflow Dual FlapsThe large flap sends a large volume of air down

SiBE041029_ATable of Contents ii1. Introduction ...v1.1 Safe

Main Functions SiBE041029_A20 Function and Control1.4 Fan Speed Control for Indoor UnitOutline Phase control and fan speed control contains 9 steps: L

SiBE041029_A Main FunctionsFunction and Control 211.5 Program Dry OperationOutline Program dry operation removes humidity while preventing the room te

Main Functions SiBE041029_A22 Function and Control1.6 Automatic OperationOutline Automatic Cooling / Heating FunctionWhen the automatic operation is s

SiBE041029_A Main FunctionsFunction and Control 231.7 Thermostat ControlOutline Thermostat control is based on the difference between the room thermis

Main Functions SiBE041029_A24 Function and Control1.8 NIGHT SET ModeOutline When the OFF TIMER is set, the NIGHT SET Mode is automatically activated.

SiBE041029_A Main FunctionsFunction and Control 251.9 HOME LEAVE OperationOutline HOME LEAVE operation is a function that allows you to record your fa

Main Functions SiBE041029_A26 Function and ControlHow to Set the Temperature and Airflow RateWhen using HOME LEAVE operation for the first time, set t

SiBE041029_A Main FunctionsFunction and Control 271.10 INTELLIGENT EYE OperationOutline This function detects the existence of humans in the room with

Main Functions SiBE041029_A28 Function and Control1.11 Inverter POWERFUL OperationOutline In order to exploit the cooling and heating capacity to full

SiBE041029_A Main FunctionsFunction and Control 291.12 Clock SettingARC433 Series The clock can be set by taking the following steps:1. Press the [CLO

SiBE041029_Aiii Table of ContentsPart 6 Service Diagnosis... 491. Troubleshooting with LED .

Main Functions SiBE041029_A30 Function and Control1.13 Other Functions1.13.1 Hot-Start FunctionIn order to prevent the cold air blast that normally co

SiBE041029_A Function of ThermistorFunction and Control 312. Function of Thermistor(1) Outdoor Heat Exchanger Thermistor 1. The outdoor heat exchang

Control Specification SiBE041029_A32 Function and Control3. Control Specification3.1 Mode HierarchyOutline Air conditioner control has normal operatio

SiBE041029_A Control SpecificationFunction and Control 333.2 Frequency ControlOutline Frequency is determined according to the difference between the

Control Specification SiBE041029_A34 Function and ControlIndoor Frequency Command (∆D signal)The difference between the room thermistor temperature an

SiBE041029_A Control SpecificationFunction and Control 353.3 Controls at Mode Changing / Start-up3.3.1 Preheating ControlOutline The inverter operatio

Control Specification SiBE041029_A36 Function and Control3.3.3 Four Way Valve Operation CompensationOutline At the beginning of the operation as the f

SiBE041029_A Control SpecificationFunction and Control 373.4 Discharge Pipe Temperature ControlOutline The discharge pipe temperature is used as the i

Control Specification SiBE041029_A38 Function and Control3.5 Input Current ControlOutline The microcomputer calculates the input current while the com

SiBE041029_A Control SpecificationFunction and Control 393.6 Freeze-up Protection ControlOutline During cooling operation, the signal sent from the in

SiBE041029_ATable of Contents ivPart 7 Trial Operation and Field Settings... 1051. Pump Down Operation...

Control Specification SiBE041029_A40 Function and Control3.8 Outdoor Fan Control1. Fan ON control to cool down the electrical boxThe outdoor fan is tu

SiBE041029_A Control SpecificationFunction and Control 413.10 Defrost ControlOutline Defrosting is carried out by the cooling cycle (reverse cycle). T

Control Specification SiBE041029_A42 Function and Control3.11 Electronic Expansion Valve ControlOutline The following items are included in the electr

SiBE041029_A Control SpecificationFunction and Control 433.11.1 Fully Closing with Power ONThe electronic expansion valve is initialized when turning

Control Specification SiBE041029_A44 Function and Control3.11.7 Control for Disconnection of the Discharge Pipe ThermistorOutline The disconnection of

SiBE041029_A Control SpecificationFunction and Control 453.12 Malfunctions3.12.1 Sensor Malfunction DetectionSensor malfunction may occur in the therm

SiBE041029_A46 Remote ControllerPart 5Remote Controller1. FTX50/60/71GV1B...

SiBE041029_A FTX50/60/71GV1BRemote Controller 471. FTX50/60/71GV1BReference Refer to the following pages for detail.Note: Refer to the operation manu

FTX50/60/71GV1B SiBE041029_A48 Remote ControllerOpen the Front CoverReference Refer to the following pages for detail.Note: Refer to the operation man

SiBE041029_AService Diagnosis 49Part 6Service Diagnosis1. Troubleshooting with LED ...

Introduction SiBE041029_Av1. Introduction1.1 Safety CautionsCautions and WarningsBe sure to read the following safety cautions before conducting repa

SiBE041029_A50 Service Diagnosis5.13 Capacitor Voltage Check...1035.14 Power Module

SiBE041029_A Troubleshooting with LEDService Diagnosis 511. Troubleshooting with LED1.1 Indoor UnitOperation Lamp The operation lamp blinks when any o

Problem Symptoms and Measures SiBE041029_A52 Service Diagnosis2. Problem Symptoms and MeasuresSymptom Check Item Details of Measure ReferencePageThe u

SiBE041029_A Service Check FunctionService Diagnosis 533. Service Check FunctionCheck Method 1 1. When the timer cancel button is held down for 5 seco

Service Check Function SiBE041029_A54 Service DiagnosisCheck Method 21. Press the center of the [TEMP] button and the [MODE] button at the same time t

SiBE041029_A Service Check FunctionService Diagnosis 555. Press the [TEMP]  or  button and change the number until you hear the long beep.6. Diagnos

Troubleshooting SiBE041029_A56 Service Diagnosis4. Troubleshooting4.1 Error Codes and Description: Displayed only when system-down occurs.Error Codes

SiBE041029_A TroubleshootingService Diagnosis 574.2 Indoor Unit PCB AbnormalityError CodeA1Method of Error DetectionThe system checks if the circuit w

Troubleshooting SiBE041029_A58 Service Diagnosis4.3 Freeze-up Protection Control or Heating Peak-cut ControlError CodeA5Method of Error DetectionFree

SiBE041029_A TroubleshootingService Diagnosis 594.4 Fan Motor (DC Motor) or Related AbnormalityError CodeA6Method of Error DetectionThe rotation speed

SiBE041029_A IntroductionviBe sure to wear a safety helmet, gloves, and a safety belt when working at a high place (more than 2 m). Insufficient safet

Troubleshooting SiBE041029_A60 Service DiagnosisTroubleshootingCheck No.02Refer to P.96Turn off the power supply and disconnect the fan motor connecto

SiBE041029_A TroubleshootingService Diagnosis 614.5 Thermistor or Related Abnormality (Indoor Unit)Error CodeC4, C9 Method of Error DetectionThe temp

Troubleshooting SiBE041029_A62 Service Diagnosis4.6 Refrigerant ShortageError CodeU0Method of Error DetectionRefrigerant shortage detection I:Refriger

SiBE041029_A TroubleshootingService Diagnosis 63TroubleshootingCheck No.01Refer to P.95Check No.12Refer to P.97(R16015)CautionYESNGNONOYESYESYESNOYESN

Troubleshooting SiBE041029_A64 Service Diagnosis4.7 Low-voltage Detection or Over-voltage DetectionError CodeU2Method of Error DetectionLow-voltage de

SiBE041029_A TroubleshootingService Diagnosis 65TroubleshootingCorrect the power supply.Replace the outdoor unit PCB.Check for such factors for a long

Troubleshooting SiBE041029_A66 Service Diagnosis4.8 Signal Transmission Error (between Indoor Unit and Outdoor Unit)Error CodeU4Method of Error Detect

SiBE041029_A TroubleshootingService Diagnosis 67TroubleshootingCheck No.11Refer to P.96Check No.11Check the power supply waveform.Check the voltage of

Troubleshooting SiBE041029_A68 Service Diagnosis4.9 Signal Transmission Error on Outdoor Unit PCB (RX50/60G2V1B, 71 Class Only)Error CodeU7Method of E

SiBE041029_A TroubleshootingService Diagnosis 694.10 Unspecified Voltage (between Indoor Unit and Outdoor Unit)Error Code UAMethod of Error Detection

Introduction SiBE041029_Avii1.1.2 Cautions Regarding Safety of UsersWarningBe sure to use parts listed in the service parts list of the applicable mod

Troubleshooting SiBE041029_A70 Service Diagnosis4.11 Outdoor Unit PCB AbnormalityError Code E1Method of Error DetectionThe system checks if the micr

SiBE041029_A TroubleshootingService Diagnosis 71Troubleshooting RX50/60G3V1BCautionBe sure to turn off the power switch before connecting or disconnec

Troubleshooting SiBE041029_A72 Service Diagnosis4.12 OL Activation (Compressor Overload)Error CodeE5Method of Error DetectionA compressor overload is

SiBE041029_A TroubleshootingService Diagnosis 73TroubleshootingCheck No.01Refer to P.95Check No.12Refer to P.97Check No.13Refer to P.98Check No.14Refe

Troubleshooting SiBE041029_A74 Service Diagnosis4.13 Compressor LockError CodeE6Method of Error DetectionA compressor lock is detected by checking the

SiBE041029_A TroubleshootingService Diagnosis 754.14 DC Fan LockError CodeE7Method of Error DetectionAn error is determined with the high-voltage fan

Troubleshooting SiBE041029_A76 Service Diagnosis4.15 Input Overcurrent DetectionError CodeE8Method of Error DetectionAn input overcurrent is detected

SiBE041029_A TroubleshootingService Diagnosis 774.16 Four Way Valve AbnormalityError CodeEAMethod of Error DetectionThe room temperature thermistor an

Troubleshooting SiBE041029_A78 Service DiagnosisTroubleshootingCheck No.01Refer to P.95Check No.13Refer to P.98Check No.14Refer to P.98NGOKNOOKNGOKYES

SiBE041029_A TroubleshootingService Diagnosis 794.17 Discharge Pipe Temperature ControlError CodeF3Method of Error DetectionAn error is determined wit

SiBE041029_A IntroductionviiiCheck to make sure that the power cable plug is not dirty or loose, then insert the plug into a power outlet securely.If

Troubleshooting SiBE041029_A80 Service Diagnosis4.18 High Pressure Control in CoolingError CodeF6Method of Error DetectionHigh-pressure control (opera

SiBE041029_A TroubleshootingService Diagnosis 814.19 Compressor System Sensor Abnormality4.19.1 RX50/60G2V1B, 71 ClassError CodeH0Method of Error Dete

Troubleshooting SiBE041029_A82 Service Diagnosis4.19.2 RX50/60G3V1BError Code H0Method of Error DetectionThe system checks the DC current before the

SiBE041029_A TroubleshootingService Diagnosis 834.20 Position Sensor AbnormalityError CodeH6Method of Error DetectionA compressor start-up failure is

Troubleshooting SiBE041029_A84 Service DiagnosisTroubleshooting RX50/60G2V1B, 71 classCheck No.15Refer to P.99Check No.18Refer to P.101CautionBe sure

SiBE041029_A TroubleshootingService Diagnosis 85Troubleshooting RX50/60G3V1BCheck No.15Refer to P.99Check No.18Refer to P.101Check No.20Refer to P.102

Troubleshooting SiBE041029_A86 Service Diagnosis4.21 CT or Related Abnormality (RX50/60G2V1B, 71 Class Only)Error CodeH8Method of Error DetectionA CT

SiBE041029_A TroubleshootingService Diagnosis 87TroubleshootingCheck No.15Refer to P.99Check No.21Refer to P.103(R18341)CautionYES2 secTimeNONOYESYESN

Troubleshooting SiBE041029_A88 Service Diagnosis4.22 Thermistor or Related Abnormality (Outdoor Unit)Error Code H9, J3, J6, P4Method of Error Detectio

SiBE041029_A TroubleshootingService Diagnosis 89Troubleshooting In case of “H9” “J3” “J6”Check No.01Refer to P.95H9 : Outdoor temperature thermistorJ3